Shop › ARP Head Stud Kit for LZx Engines Image 1 of 1 ARP Head Stud Kit for LZx Engines $255.00 This kit is for the 3500/3900 VVT V6 Engines. Includes 16 studs, washers, and 12 point nuts. Get notified by email when this product is in stock. Add To Cart Added! This kit is for the 3500/3900 VVT V6 Engines. Includes 16 studs, washers, and 12 point nuts.